Improvement in reciprocating steam-engines and saw-mills combined



2 Shets -Shegt 1 n I. BR0WN. v Reciprocating Ste-amEngines and. Circular SaM-MiIlsg Combined. I No. 139,233. f Patentedma zmsmy In v 2: fair;

VViZ'nesses:

AM, PHOTD-UUIUGRAPHIC ca M).(08BORNE:$ Pn cms) I i ZS heetse-SheetZ. I I. BROWN. a Reciprocating Steam Engines and Circular Slaw-[Mills Combined. N0,]39,233, J PatentedMay 27,1873

AMkflara-ummAPH/c m. Mmfosqonnsls PRacsss) 'while at the same time, at each stroke of the the piston is prevented from lateral pressure circular-saw mill, with additional strength in UNITED Srnrns PATENT OFFICE.

ISAAC BROWN, OF GLENVILLE, MARYLAND.

IMPROVEMENT \N RECIPROCATING STEAM-ENGINES AND SAW-MlLLS COMBlNED.

Specification forming part of Letters Patent No. 139,233, dated May 27, 1873; application filed April 9, 1873. i r

To all whom it may concern:

Be it known that I, ISAAO BROWN, of Glenville, Prince George county, State of Maryland,have invented a Combined Steam-Engine Circular-Saw Mill, of which the following is a specification The object of my invention is the disconnecting of both ends of the double-length piston-rod from the U-shaped cross-head,

formed and firmly connected to or wit a above and below it, and guided by wood or other material secured thereto, and adjusta ble with bolts at each end of the cylinder H. The piston-rod is of double length with the head K, near the middle and opposite the lugs L on the cross-head G, and thereby balengine, all the useful efiect of an actual connection of the rod with the cross-head is preserved, and the disadvantages avoided, and

pressure upon the cross-head Gr. This pistonon the cylinder, and avoids the cutting or t rod passes through glands in each head of the abrasion that is induced by the piston working out of l ne when running at great speed. Its practical use is therefore well adapted to driving machinery, where quick speed is re quired, by a direct action upon the large circular saw, which is secured in the usual way upon the end of the shaft of the engine, which shaft supplies the place of saw-mandrel. This engine can be either vertical or horizontal for driving other machinery requiring quick speeds without the aid of belts.

The following description, with the drawing, in which Figure 1 is a perspective and Fig. 2 a vertical sectional view, will. enable those skilled in the construction of steam-engines and portable steam saw-mills to understand how to construct and use the same.

A frame of wood or iron is constructed, of length, width, and depth of the usual dimensions to allow room for the machinery of a fill the space between the inside of each end of the cross-head at I, where a smooth bearingadjustable to take up lost motion at the pistonrod to prevent jarring, butleft so slack as not to be carried out of line by the wear 'of the cross-head or gibs; and, thus arranged, the

that the substantial construction of the parts cylinder.

the ordinary steam-engine further than in the drawings only to show the connection with my improvement for a more clear understanding of the same.

I claim- The combination of a steam cylinder, detached piston-rod, cross-head, and forked connecting-rods, as described.

ISAAC snow.

the back part of the frame A, on which is erected a ver cal engine, with shaft, fly-wheel, valve motions, and appliances to make a steamengine, with the improvements as hereinafter described.

The elevation of the cylinder H on the standO is made sufficient in height above the crank D to give the usual length to the forked Witnesses:

Emu. F. BROWN, J. D. OCONNELL.

connecting-rod F, which extends on each side, of the cylinder H to the lugs L, and connected thereto by straps, gibs, 8210. 'These lugs are looped or U- haped rod, performing the office of cross-head Gr, which cross-head is worked. on each side of the cylinder H, extendingances the action of the connecting-rod F to the cylinder H, extending in lengthso as to nearly piece across one end of the cross-head is made speed of the piston may move at any rate, will justify without cutting or abrading the u I have not described the parts pertaining to 

